package com.example.function_interface.predicate;

import com.example.function_interface.User;
import org.junit.Test;

import java.util.ArrayList;
import java.util.List;
import java.util.function.IntPredicate;

/**
 * 接受一个int输入参数，返回一个布尔值的结果。
 */
public class IntPredicateTest {
    @Test
    public void myTest() throws Exception{
        List<User> userList = new ArrayList<>();
        User user1 = new User(1, "张三", 12, false, 23.8);
        User user2 = new User(2, "李四", 22, false, 200);
        User user3 = new User(3, "王五", 32, true, 123.2);
        User user4 = new User(4, "郑静", 2, true, 0);
        userList.add(user1);
        userList.add(user2);
        userList.add(user3);
        userList.add(user4);

        IntPredicate intPredicate = new IntPredicate() {
            @Override
            public boolean test(int value) {
                return value > 18;
            }
        };
        IntPredicate intPredicate1 = intPredicate.and(value -> value < 30);
        IntPredicate intPredicate2 = intPredicate.or(value -> value < 14);

        System.out.println("大于18并且小于30："+intPredicate1.test(user2.getAge()));
        System.out.println("大于18或者小于14："+intPredicate2.test(user2.getAge()));

        System.out.println("小于18或者大于30："+intPredicate1.negate().test(user2.getAge()));
        System.out.println("小于18并且大于14："+intPredicate2.negate().test(user2.getAge()));
    }
}
